Apparatus for manufacturing particles has at least one reactor and a method for manufacturing particles using the same. A first reactor has a hollow main body extending in the lengthwise direction, first and second raw material inlets formed at the one side end of the main body, a reactant outlet formed at the other side end of the main body, and a mixer formed inside the main body to mix materials fed from the first and second raw material inlets. A second reactor of the apparatus connected to one side of the first reactor has a non-revolving hollow cylinder extending in the lengthwise direction, a revolving body extending in the lengthwise direction, a driver portion, a reactant inlet formed on the outer circumference at one side end of the cylinder and connected to the reactant outlet of the first reactor.